CN106913352A - Imaging system and sagging or misalignment the method for compensated scanning bed - Google Patents
Imaging system and sagging or misalignment the method for compensated scanning bed Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007665 sagging Methods 0.000 title claims abstract description 22
- 238000003384 imaging method Methods 0.000 title claims abstract description 20
- 230000008707 rearrangement Effects 0.000 claims description 16
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- 238000002591 computed tomography Methods 0.000 description 5
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Abstract
A kind of sagging or misalignment the method for compensated scanning bed, it includes：The patient being positioned on scanning bed is scanned by energy source and detector；The first data for projection is obtained in scanning bed first position and obtain the second data for projection in the scanning bed second place；Scanning bed the first bottom position is obtained from the first data for projection and obtain the second scanning bed bottom position from the second data for projection；Calculate scanning bed skew of second bottom position relative to the scanning bed bottom position of correspondence first；By processor according to the offset adjusted reconstructed center；And reconstruction image is produced according to the reconstructed center after regulation.The present invention also provides a kind of imaging system.
Description
Technical field
The present invention relates to medical image system, more particularly to for sagging or misalignment the side of compensated scanning bed
Method and imaging system.
Background technology
In at least some of computed tomography (computed tomography, CT) imaging system structure
In, the fan-shaped x-ray beam that x-ray source is produced forms collimated x-ray beam through collimater, through standard
Straight x-ray beam is located in the X-Y plane of cartesian coordinate system, and X-Y plane is commonly referred to as imaging
Plane.X-ray source is coupled to the frame 20 shown in Fig. 1.X-ray beam pass through object, such as patient,
It is scanned with to object.Object is located on scanning bed 22, and scanning bed 22 are slidably disposed in base
On 24.X-ray beam, after by object attenuation, detector array is irradiated to as a kind of attenuated x-rays beam
On row.The x that the intensity of the attenuated x-rays beam that detector array is received depends on being received by object is penetrated
The attenuation degree of wire harness.X-ray source generally includes x-ray tube, its transmitting x-ray beam.Detector array
Row are made up of multiple detector elements.
Although under the conditions of heavy load, scanning bed 22 be designed to carries on the z directions parallel to z-axis
For required precision, but scanning bed 22 do not keep rigidity to be provided with the y directions parallel to y-axis
Positioning precision.Lack rigidity and produce scanning bed sagging 26.In a z-direction, when scanning bed 22 towards away from machine
When frame 20 is not fully retracted, scanning bed sagging 26 occur.In a z-direction, when scanning bed 22 towards remote
When frame 20 of disembarking can not further bounce back, scanning bed 22 are fully retracted.In a z-direction, when scanning bed
22 towards frame 20 extend when, it is scanning bed it is sagging 26 occur.In a z-direction, when scanning bed 22 direction
When frame 20 can not further extend, scanning bed 22 is fully extended.
Scanning bed sagging 26 effect is, the dissection knot when scanning bed 22 extend produced by sweep object
Structure offsets downward relative to the anatomical structure produced by the sweep object when scanning bed 22 retract.Under scanning bed
Vertical 26, result in the suboptimum treatment of object.
Fig. 2 shows to scan two images 50 that bed position is produced respectively at two by sweep object 107
Embodiment with 52.Two scan one of bed position and are fully retracted corresponding to scanning bed 54.Two
The other of scanning bed position extends a scheduled volume, such as 1090 millimeters corresponding to scanning bed 54.
Two images 50 and 52 are reconstructed in same visual field.Ideally, in two images 50 and 52
The position of two scanning bed 54 should be identical.Because scanning bed sagging 26, in causing image 52
Scanning bed 54 than image 50 in scanning bed 54 low, the sides between image as shown in Figure 2 50 and 52
Boundary 58 shows scanning bed 54 discontinuity 56.Numerical measuring shows the scanning in image 52
Bed 54 offset by 4.5 millimeters of vertical range relative to scanning bed 54 in image 50.More heavily loaded
During lotus, scanning bed sagging 26 it is expected that up to 6 millimeters.
The content of the invention
One or more aspects of the invention are concluded now in order to basic comprehension of the invention, and wherein this is returned
It not is extensive overview of the invention to receive, and is not intended to mark some key elements of the invention, not yet
It is intended to mark its scope.Conversely, the main purpose of the conclusion is before more detailed description is presented below
Some concepts of the invention are presented with reduced form.
One aspect of the present invention, is to provide a kind of compensated scanning bed sagging or misalignment method, its
Including：
The patient being positioned on scanning bed is scanned by energy source and detector；
The first data for projection is obtained in scanning bed first position and obtain second in the scanning bed second place
Data for projection；
Scanning bed the first bottom position is obtained from the first data for projection and scanned from the second data for projection
Second bottom position of bed；
Calculate scanning bed skew of second bottom position relative to the scanning bed bottom position of correspondence first；
By processor according to the offset adjusted reconstructed center；And
Reconstruction image is produced according to the reconstructed center after regulation.
Another aspect of the present invention, is to provide a kind of imaging system, and it includes：
Energy source, for producing beam；
It is scanning bed；
Detector, for detecting the beam；
Processor, for performing following operation：
Control energy source and detector are scanned to the patient being positioned on scanning bed, with scanning
The first position of bed obtains the first data for projection and the scanning bed second place obtains the second data for projection；
Scanning bed the first bottom position is obtained from the first data for projection and obtained from the second data for projection
The second scanning bed bottom position；
Calculate the second scanning bed bottom position inclined relative to the scanning bed bottom position of correspondence first
Move；
According to the offset adjusted reconstructed center；And
Reconstruction image is produced according to the reconstructed center after regulation.
Another aspect of the invention, is to provide a kind of imaging system, and it includes：
Processor, for performing following operation：
Control energy source and detector are scanned to the patient being positioned on scanning bed, with scanning
The first position of bed obtains the first data for projection and the scanning bed second place obtains the second data for projection；
Scanning bed the first bottom position is obtained from the first data for projection and obtained from the second data for projection
The second scanning bed bottom position；
Calculate the second scanning bed bottom position inclined relative to the scanning bed bottom position of correspondence first
Move；
According to the offset adjusted reconstructed center；And
Reconstruction image is produced according to the reconstructed center after regulation.
Imaging system and method that embodiment of the present invention is provided, by calculating the second scanning bed bottom
Portion position relative to the scanning bed bottom position of correspondence first skew, according to the offset adjusted rebuild in
The heart, and reconstruction image is produced according to the reconstructed center after regulation；Can be sagging or not right with compensated scanning bed
It is accurate.
Brief description of the drawings
It is described for embodiments of the present invention by with reference to accompanying drawing, the present invention may be better understood,
In the accompanying drawings：
Fig. 1 is a kind of block diagram of the imaging system of embodiment, and the imaging system shows scanning bed sagging.
Fig. 2 scanning bed sagging examples for computed tomography images show.
Fig. 3 is a kind of isometric view of the computerized tomography of embodiment (CT) imaging system, for compensating
Scanning bed sagging method is performed wherein.
Fig. 4 is the block diagram of computed tomography imaging system shown in Fig. 3.
Fig. 5 is the flow chart of a kind of method sagging for compensated scanning bed of embodiment.
Fig. 6 shows the sagging example of compensated scanning bed for computed tomography images.
Fig. 7 is the flow chart of a kind of method for compensated scanning bed misalignment of embodiment.
Specific embodiment
Specific embodiment of the invention explained below, it should be pointed out that in these implementation methods
During specific descriptions, in order to carry out brief and concise description, this specification can not possibly be to actual implementation
All features of mode make description in detail.It is to be understood that in any one implementation method
Actual implementation process in, as during any one engineering project or design object, in order to
The objectives of developer are realized, the limitation related or commercially related in order to meet system usually can
Various specific decision-makings are made, and this also can be from a kind of implementation method to another embodiment
Change.Although moreover, it is to be understood that effort done in this development process may
It is complicated and tediously long, but the ordinary skill of this area related for present disclosure
For personnel, some designs carried out on the basis of the technology contents that the disclosure is disclosed, manufacture or raw
The change such as product is conventional technology, is not construed as content of this disclosure insufficient.
Unless otherwise defined, the technical term or scientific terminology for being used in claims and specification should
There is in by the technical field of the invention the ordinary meaning that the personage of general technical ability understands.The present invention
" first ", " second " that is used in patent application specification and claims and similar word are simultaneously
Any order, quantity or importance are not indicated that, and is used only to distinguish different parts." one "
Or the similar word such as " " is not offered as quantity limitation, but expression has at least one." including " or
The similar word such as person's "comprising" mean to appear in " including " or "comprising" before element or object contain
Lid appear in " including " or "comprising" presented hereinafter element or object and its equivalent element, do not arrange
Except other elements or object.The similar word such as " connection " or " connected " be not limited to physics or
The connection of person's machinery, and can be including electric connection, either directly still indirectly.
Fig. 3 and 4 is refer to, computerized tomography (CT) imaging system 100 includes frame 102.At this
In embodiment, CT system 100 is the CT system of the X-ray of sensing decay.In an alternate embodiment
In, CT system 100 can be energy integration, photon counting (photon counting, PC) or photon
The CT detector systems of Energy identifying (photon energy discriminating, PED).
Frame 102 has x-ray source 104, and x-ray source 104 launches X towards detector array 106
Beam.X-ray passes through object 107, such as patient, to produce the X-ray of decay.Detector array
Row 106 include multiple detector elements 108, and the X that multiple detector elements 108 are used to sense decay is penetrated
Line.
In an alternative embodiment, each detector element 108 of detector array 106 can be light
Sub- energy integral detector, photon counting or photon energy differentiate detector.Each detector element 108
Produce the electric signal of the intensity of the X-ray for characterizing decay.During scanning is to obtain data for projection,
Frame 102 and the part in frame 102 are rotated around pivot 110.
The rotation of the control frame 102 of controlling organization 112 of CT system 100 and the behaviour of x-ray source 104
Make.Controlling organization 112 includes X-ray controller 126, gantry motor controller 114, data acquisition system
System (data acquisition system, DAS) 116, preprocessor 118.X-ray controller 126 is used
In to x-ray source 104 offer power and timing signal.Gantry motor controller 114 is used to control frame
102 rotary speed and position.Data collecting system 116 is used for from multiple detector elements 108
Data for projection sampled and digitized, and by the data for projection be converted into sampling and digitized projection
Data, for subsequent treatment.
Preprocessor 118 receives sampling and digitized data for projection from data collecting system 116,
And the sampling and digitized data for projection are pre-processed.In one embodiment, pretreatment includes
But it is not limited to offset correction, principal velocity correction, reference channel correction, air calibration, and/or applies negative right
Number computing.118 pairs of samplings of preprocessor and digitized data for projection are pre-processed, pre- to produce
The data for projection for the treatment of.
Image reconstructor 120 receives pretreated data for projection from preprocessor 118, and performs image
Reconstruction operation, to produce reconstruction image.Reconstruction image puts on computer 122, computer as input
The reconstruction image is stored in mass-memory unit 124 by 122.X-ray controller 126 is based on rebuilding to be schemed
Tube current in the quality regulation x-ray source 104 of picture.
Computer 122 also receives order and sweep parameter from user, such as by with user interface facilities
Console 128 receive operator order and sweep parameter.Cathode-ray tube display 130 allows to use
Family, such as operator, from the observation reconstruction image of computer 122 and other data.The basis of computer 122
Order and sweep parameter are to data collecting system 116, X-ray controller 126 and gantry motor controller 114
Control signal and information are provided.Additionally, computer 122 operates scanning bed motor controller 132 so that
Scanning bed the 134 of the control motorization of scanning bed motor controller 132 are fixed by object 107, such as patient
In frame 102.Especially, scanning bed motor controller 132 adjusts scanning bed 134 with by object
107 subregion is moved in frame openings 136 and so that object 107 is centered at frame openings 136
It is interior.Scanning bed 134 are arranged on base 135, and base 135 is an example of base 24 shown in Fig. 1.
Scanning bed 22 and 54 is scanning bed 134 example shown in Fig. 1 and Fig. 2.
In an alternative embodiment, x-ray source 104 can be configured as projecting height towards object 107
The high frequency electromagnetic energy projection source of frequency electromagnetic energy replaces.Detector array 106 can be arranged at frame
102 detector arrays that are interior and can detecting the high frequency electromagnetic energy replace.
Fig. 5 is the flow chart of a kind of method 500 sagging for compensated scanning bed of embodiment.Method 500
It is implemented in computer 122 shown in Fig. 4, method 500 includes：
Step 502：Computer 122 controls x-ray source 104 to produce one by X-ray controller 126
Individual or multiple fan-ray beams or cone beam.
Step 504：Computer 122 controls x-ray source 104 and detector array 106 pairs to be positioned over and sweep
The patient retouched on bed 134 is scanned.Wherein, patient is scanned and is swept including carrying out spiral to patient
(English is to retouch (English for helical scan), axial scan (English is axial scan) or cine scan
cine scan).Wherein, cine scan is referred to as dynamic scan.
Step 506：Computer 122 by data collecting system (DAS) 116 scanning bed 134 the
One position obtains the first data for projection and the second place the second data for projection of acquisition scanning bed 134.Its
In, scanning bed 134 first position is in scanning process scanning bed 134 first position or last
One position.Scanning bed 134 first position it can be appreciated that scanning bed 134 reference position or
Reference position.
In step 508 and 510, computer 122 obtains the of scanning bed 134 from the first data for projection
One bottom position and obtained from the second data for projection scanning bed 134 the second bottom position.Specifically, exist
In a kind of embodiment, in step 508, computer 122 performs algorithm with to the first data for projection and the
Two data for projection carry out fladellum to the rearrangement of parallel beam, with produce respectively rearrangement the first data for projection and
The second data for projection reset；In step 510, computer 122 is also from the first data for projection reset
Obtain scanning bed 134 the first bottom position and obtain scanning bed 134 from the second data for projection reset
The second bottom position.In a kind of alternate embodiment, as the replacement of step 508, computer 122
Perform algorithm carries out pencil-beam to the rearrangement of parallel beam with to the first data for projection and the second data for projection, with
The second data for projection for producing the first data for projection of rearrangement respectively and resetting；As the replacement of step 510,
Computer 122 also from reset the first data for projection obtain scanning bed 134 the first bottom position and from
The second data for projection reset obtains scanning bed 134 the second bottom position.
Step 512：Computer 122 calculates scanning bed 134 the second bottom position relative to scanning bed 134
The bottom position of correspondence first skew.
Step 514：Reconstructed center (x, y) is replaced with (x, y+ Δ y) by computer 122；Wherein Δ y
It is scanning bed 134 correspondence first bottom position of second bottom position relative to scanning bed 134 vertical
Skew on direction.Wherein, computer 122 can include processor.
Step 516：According to the reconstructed center after regulation, (x, y+ Δ y) control image reconstruction to computer 122
Device 120 produces reconstruction image f (x, y+ Δ y, z).
By performing above-mentioned steps 502 to 516, it is possible to achieve to scanning bed 134 in vertical direction (i.e. y
Direction of principal axis) on skew compensate, namely realize the compensation sagging to scanning bed 134.
Fig. 6 shows the sagging example of compensated scanning bed for computed tomography images.In reconstruction image
In f (x, y+ Δ y, z), scanning bed sagging produced artifact is reduced.As shown in fig. 6, image 50
Scanning bed 54 are shown in retracted position, image 802 shows that scanning bed 54 extend relative to retracted position
One scheduled volume, such as 1090 millimeters.Relative to image 50 shown in Fig. 2 and 52, in image 50 and 802
In, scanning bed 54 point 804 and 806 between image 50 and image 802 aligns.
Fig. 7 is the flow chart of a kind of method 600 for compensated scanning bed misalignment of embodiment.Method
600 are implemented in computer 122 shown in Fig. 4, and method 600 includes：
Step 602：Computer 122 controls x-ray source 104 to produce one by X-ray controller 126
Individual or multiple fan-ray beams or cone beam.
Step 604：Computer 122 controls x-ray source 104 and detector array 106 pairs to be positioned over and sweep
The patient retouched on bed 134 is scanned.
Step 606：Computer 122 by data collecting system (DAS) 116 scanning bed 134 the
One position obtains the first data for projection and the second place the second data for projection of acquisition scanning bed 134.Its
In, scanning bed 134 first position is in scanning process scanning bed 134 first position or last
One position.Scanning bed 134 first position it can be appreciated that scanning bed 134 reference position or
Reference position.
In step 608 and 610, computer 122 obtains the of scanning bed 134 from the first data for projection
One bottom position and obtained from the second data for projection scanning bed 134 the second bottom position.Specifically, exist
In a kind of embodiment, in step 608, computer 122 performs algorithm with to the first data for projection and the
Two data for projection carry out fladellum to the rearrangement of parallel beam, with produce respectively rearrangement the first data for projection and
The second data for projection reset；In step 610, computer 122 is also from the first data for projection reset
Obtain scanning bed 134 the first bottom position and obtain scanning bed 134 from the second data for projection reset
The second bottom position.In a kind of alternate embodiment, as the replacement of step 608, computer 122
Perform algorithm carries out pencil-beam to the rearrangement of parallel beam with to the first data for projection and the second data for projection, with
The second data for projection for producing the first data for projection of rearrangement respectively and resetting；As the replacement of step 610,
Computer 122 also from reset the first data for projection obtain scanning bed 134 the first bottom position and from
The second data for projection reset obtains scanning bed 134 the second bottom position.
Step 612：Computer 122 calculates scanning bed 134 the second bottom position relative to scanning bed 134
The bottom position of correspondence first skew.
Step 614：Computer 122 replaces with (x+ Δs x, y) reconstructed center (x, y)；Wherein Δ x
It is scanning bed 134 correspondence first bottom position of second bottom position relative to scanning bed 134 in level
Skew on direction.
Step 616：Computer 122 controls image reconstruction according to the reconstructed center (x+ Δs x, y) after regulation
Device 120 produces reconstruction image f (x+ Δs x, y, z).
By above-mentioned execution above-mentioned steps 602 to 616, it is possible to achieve to scanning bed 134 in the horizontal direction
Skew on (i.e. x-axis direction) is compensated, namely realizes the compensation to scanning bed 134 misalignment.
In other embodiments, reconstructed center (x, y) is replaced with (x+ Δs x, y+ Δ y) by computer 122；
Wherein Δ x is scanning bed 134 correspondence first bottom position of second bottom position relative to scanning bed 134
Skew in the horizontal direction, Δ y be scanning bed 134 the second bottom position relative to scanning bed 134
The skew of the first bottom position in the vertical direction of correspondence；Computer 122 is according to the reconstructed center after regulation
(x+ Δs x, y+ Δ y) control image reconstructors 120 produce reconstruction image f (x+ Δs x, y+ Δ y, z).In this way,
Both the skew on scanning bed 134 in the horizontal direction (i.e. x-axis direction) can be compensated, it is also possible to
Scanning bed 134 skews on vertical direction (i.e. y-axis direction) are compensated.
Although with reference to specific implementation method, the present invention is described, and those skilled in the art can
To understand, can be so that many modifications may be made and modification to the present invention.It is therefore contemplated that, claims
The all such modifications for being intended to be covered in true spirit of the present invention and scope and modification.
Claims (15)
1. sagging or misalignment the method for a kind of compensated scanning bed, it includes：
The patient being positioned on scanning bed is scanned by energy source and detector；
The first data for projection is obtained in scanning bed first position and obtain second in the scanning bed second place
Data for projection；
Scanning bed the first bottom position is obtained from the first data for projection and scanned from the second data for projection
Second bottom position of bed；
Calculate scanning bed skew of second bottom position relative to the scanning bed bottom position of correspondence first；
By processor according to the offset adjusted reconstructed center；And
Reconstruction image is produced according to the reconstructed center after regulation.
2. the method for claim 1, it is characterised in that：The scanning bed first position is scanning
During scanning bed first position or last position.
3. the method for claim 1, it is characterised in that：According to the offset adjusted reconstructed center
And included according to the reconstructed center generation reconstruction image after regulation：
Reconstructed center (x, y) is replaced with into (x, y+ Δ y)；And
Produce reconstruction image f (x, y+ Δ y, z)；Wherein Δ y be the second scanning bed bottom position relative to
The skew of scanning bed correspondence the first bottom position in the vertical direction.
4. the method for claim 1, it is characterised in that：According to the offset adjusted reconstructed center
And included according to the reconstructed center generation reconstruction image after regulation：
Reconstructed center (x, y) is replaced with (x+ Δs x, y)；And
Produce reconstruction image f (x+ Δs x, y, z)；Wherein Δ x be the second scanning bed bottom position relative to
The skew in the horizontal direction of the scanning bed bottom position of correspondence first.
5. the method for claim 1, it is characterised in that：According to the offset adjusted reconstructed center
And included according to the reconstructed center generation reconstruction image after regulation：
Reconstructed center (x, y) is replaced with into (x+ Δs x, y+ Δ y)；
Produce reconstruction image f (x+ Δs x, y+ Δ y, z)；Wherein Δ x is that the second scanning bed bottom position is relative
In the skew in the horizontal direction of the scanning bed bottom position of correspondence first, Δ y is the second scanning bed bottom
Skew of the position relative to scanning bed correspondence the first bottom position in the vertical direction.
6. the method for claim 1, it is characterised in that：Patient is scanned including to patient
Carry out helical scanning, axial scan or cine scan.
7. the method for claim 1, it is characterised in that：The energy source is used to produce one or many
Individual fan-ray beam, one or more fan-ray beams are projected to patient；
Wherein, it is described to obtain scanning bed the first bottom position and from the second projection number from the first data for projection
Include according to the second bottom position for obtaining scanning bed：
Fladellum to the rearrangement of parallel beam is carried out to the first data for projection and the second data for projection, to produce respectively
Raw the first data for projection reset and the second data for projection reset；
Scanning bed the first bottom position and the second throwing from rearrangement is obtained from the first data for projection reset
Shadow data obtain the second scanning bed bottom position.
8. the method for claim 1, it is characterised in that：The energy source is used to produce one or many
Individual cone beam, one or more cone beams are projected to patient；
Wherein, it is described to obtain scanning bed the first bottom position and from the second projection number from the first data for projection
Include according to the second bottom position for obtaining scanning bed：
Pencil-beam to the rearrangement of parallel beam is carried out to the first data for projection and the second data for projection, to produce respectively
Raw the first data for projection reset and the second data for projection reset；
Scanning bed the first bottom position and the second throwing from rearrangement is obtained from the first data for projection reset
Shadow data obtain the second scanning bed bottom position.
9. a kind of imaging system, it includes：
Energy source, for producing beam；
It is scanning bed；
Detector, for detecting the beam；
Processor, for performing following operation：
Control energy source and detector are scanned to the patient being positioned on scanning bed, with scanning
The first position of bed obtains the first data for projection and the scanning bed second place obtains the second data for projection；
Scanning bed the first bottom position is obtained from the first data for projection and obtained from the second data for projection
The second scanning bed bottom position；
Calculate the second scanning bed bottom position inclined relative to the scanning bed bottom position of correspondence first
Move；
According to the offset adjusted reconstructed center；And
Reconstruction image is produced according to the reconstructed center after regulation.
10. imaging system as claimed in claim 9, it is characterised in that：The scanning bed first position
It is scanning bed first position or last position in scanning process.
11. imaging systems as claimed in claim 9, it is characterised in that the processor is additionally operable to：
Reconstructed center (x, y) is replaced with into (x, y+ Δ y)；And
Produce reconstruction image f (x, y+ Δ y, z)；Wherein Δ y be the second scanning bed bottom position relative to
The skew of scanning bed correspondence the first bottom position in the vertical direction.
12. imaging systems as claimed in claim 9, it is characterised in that the processor is additionally operable to：
Reconstructed center (x, y) is replaced with (x+ Δs x, y)；And
Produce reconstruction image f (x+ Δs x, y, z)；Wherein Δ x be the second scanning bed bottom position relative to
The skew in the horizontal direction of the scanning bed bottom position of correspondence first.
13. imaging systems as claimed in claim 9, it is characterised in that the processor is additionally operable to：
Reconstructed center (x, y) is replaced with into (x+ Δs x, y+ Δ y)；And
Produce reconstruction image f (x+ Δs x, y+ Δ y, z)；Wherein Δ x is that the second scanning bed bottom position is relative
In the skew in the horizontal direction of the scanning bed bottom position of correspondence first, Δ y is the second scanning bed bottom
Skew of the position relative to scanning bed correspondence the first bottom position in the vertical direction.
14. imaging systems as claimed in claim 9, it is characterised in that the energy source is used to produce one
Individual or multiple fan-ray beams, one or more fan-ray beams are projected to patient；The processor is also
For：
Fladellum to the rearrangement of parallel beam is carried out to the first data for projection and the second data for projection, to produce respectively
Raw the first data for projection reset and the second data for projection reset；
Scanning bed the first bottom position and the second throwing from rearrangement is obtained from the first data for projection reset
Shadow data obtain the second scanning bed bottom position.
15. imaging systems as claimed in claim 9, it is characterised in that the energy source is used to produce one
Individual or multiple cone beams, one or more cone beams are projected to patient；The processor is also
For：
Pencil-beam to the rearrangement of parallel beam is carried out to the first data for projection and the second data for projection, to produce respectively
Raw the first data for projection reset and the second data for projection reset；
Scanning bed the first bottom position and the second throwing from rearrangement is obtained from the first data for projection reset
Shadow data obtain the second scanning bed bottom position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510996122.5A CN106913352A (en) | 2015-12-25 | 2015-12-25 | Imaging system and sagging or misalignment the method for compensated scanning bed |
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| CN201510996122.5A CN106913352A (en) | 2015-12-25 | 2015-12-25 | Imaging system and sagging or misalignment the method for compensated scanning bed |
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| CN201510996122.5A Pending CN106913352A (en) | 2015-12-25 | 2015-12-25 | Imaging system and sagging or misalignment the method for compensated scanning bed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109480884A (en) * | 2018-12-06 | 2019-03-19 | 宁波耀通管阀科技有限公司 | Profile thickness analysis institution |
| CN110916700A (en) * | 2019-11-22 | 2020-03-27 | 东软医疗系统股份有限公司 | Imaging method, device and scanning system |
| CN114391864A (en) * | 2022-01-21 | 2022-04-26 | 明峰医疗系统股份有限公司 | Detection and correction method for scanning bed |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08299323A (en) * | 1995-04-27 | 1996-11-19 | Line Seiki Kk | Deflection correcting device |
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2015
- 2015-12-25 CN CN201510996122.5A patent/CN106913352A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08299323A (en) * | 1995-04-27 | 1996-11-19 | Line Seiki Kk | Deflection correcting device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109480884A (en) * | 2018-12-06 | 2019-03-19 | 宁波耀通管阀科技有限公司 | Profile thickness analysis institution |
| CN110916700A (en) * | 2019-11-22 | 2020-03-27 | 东软医疗系统股份有限公司 | Imaging method, device and scanning system |
| CN110916700B (en) * | 2019-11-22 | 2023-05-09 | 沈阳智核医疗科技有限公司 | Imaging method, imaging device and scanning system |
| CN114391864A (en) * | 2022-01-21 | 2022-04-26 | 明峰医疗系统股份有限公司 | Detection and correction method for scanning bed |
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